Ah okay, yea, definitely go with 22-24 monitor for gaming. As for the contrast ratios, those 500xxx:1 is more for imaging monitors or art stuff where extreme precise color is important. 10,000:1 is fine if you're just gaming or watching movies, casual stuff, you won't notice a difference. Aside from the recommendation below, take a look at Samsung or Viewsonic, they make great monitors. Strictly from a gaming perspective, what you want in a monitor is good viewing angles, and fast response rate, 5ms or lower because you don't want any ghosting when you game. Again, snipe monitors off deal sites when you can, I've seen the asus one below go for around 120$ which is a steal.
Asus 1080p
http://www.newegg.com/Product/Produc...82E16824236052
For the SSD, you would only want to put the OS, anti virus, and possibly a few programs that you use often that usually would take long to load on a normal hd, ex. adobe photoshop. Otherwise, you don't want to put files such as video or music and everything else on the SSD (put them on the normal hdd) as it wears down the write cycles (they are finite, but a ssd would still last 4-5 years before its not able to write anymore). The Azza looks like a good case, I only suggested the 400R to stay within your budget, although it's an amazing case at that price.
For the mouse/kb, I don't know much about left handed mouse, so I can't comment too much. I've always been a fan of logitech for accessories, so take a look at the new G300, that one is left handed. For keyboard, take a look at logitech, razer, or steelseries and I'm sure you can pick one out. I played a lot of mmo's too and extra macro keys are important, I picked up my Logitech G15 when it was on sale for 40$ nearly a year ago, but I don't think they sell them anymore. Newer gen logi keyboads are 100+, which isn't good value so try looking at other vendors I mentioned. All the parts I selected for you, will give you great performance, max settings on almost every game now at 1080p, given a few exceptions like Crysis and what not. You should OC though, it's so damn easy. Even though I am experienced at OC-ing, uber deep knowledge isn't required to OC the 1155, it literally took me 30 seconds to go to 4.0ghz from 3.3ghz with changing maybe 2-3 settings, so anyone can do it. To get to 4.0ghz, you pretty much just need to change the multiplier to 40x on the 2500k, and maybe add a tiny bit of voltage, often time non at all, so it's very doable. There are plenty of OC guides online that'll tackle any question you have.
Finally, if you do decide to look at other cases, I got some suggestions that you might find helpful aside the azza, but from what i can tell, the azza seems pretty decent.
-Cooler Master Haf X, 912, 922, 932
-Corsair 500R, 600T Special Edition << my personal case

-NZXT Phantom